Blanton Lake South Lobe
Blanton Lake South Lobe in Pasco County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2 ft visibility. Phosphorus: 140 µg/L.
- Clarity
- 2 ft
- Typical in August
- 87°F
- Max depth
- ~38 ft est.
- Type
- Hypereutrophic
- Trend
- ↑ Improving
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Blanton Lake South Lobe →
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Blanton Lake South Lobe is a highly nutrient-loaded hypereutrophic lake in Pasco County, Florida with an estimated average depth of about 38 feet. Water quality is graded D based on 1 sampling years through 2025. Overall water quality is improving over recent sampling years. Compared to the 14 other monitored lakes in Pasco County, Blanton Lake South Lobe ranks #15 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-04-03. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
Very murky, less than 2 ft of visibility. Phosphorus level: 140 µg/L. Trophic State Index: 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | Not graded |
| Phosphorus | 140 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Blanton Lake South Lobe
Compare lakeside cabins, hotels, and vacation rentals near Blanton Lake South Lobe in Pasco County, Florida — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Blanton Lake South Lobe are listed below.
Top-rated places to stay near Blanton Lake South Lobe
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Blanton Lake South Lobe typically sits around 87°F at the surface in August. Summer average is about 89°F. Usually warmest in Jul (about 91°F) and coldest in Jan (about 61°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 63 field readings (2010–2025) via the EPA Water Quality Portal. See the full Blanton Lake South Lobe water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~38 ft est. |
| Average Depth | ~13 ft est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Florida has not published bathymetry for Blanton Lake South Lobe.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing Blanton Lake South Lobe
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.3 m/yr | 2 |
| Phosphorus | ↑ Improving | -5 µg/L/yr | 2 |
County Ranking
Ranked #15 of 15 lakes in Pasco County
Nearby Lakes With Higher Grades
Blanton Lake South Lobe holds Grade D. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Pasco County
Frequently asked questions about Blanton Lake South Lobe
Where is Blanton Lake South Lobe?
- Blanton Lake South Lobe is a lake in Pasco County, Florida. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Blanton Lake South Lobe?
- Blanton Lake South Lobe in Pasco County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2 ft visibility. Phosphorus: 140 µg/L.
Is Blanton Lake South Lobe safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Blanton Lake South Lobe has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
What is the water temperature of Blanton Lake South Lobe?
- Blanton Lake South Lobe typically sits around 87°F at the surface in August, from 63 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
How deep is Blanton Lake South Lobe?
- No published bathymetric survey covers Blanton Lake South Lobe, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 38 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Blanton Lake South Lobe across LakeQuality
More Florida Lake Rankings
Other Grade D Lakes in Florida
Hypereutrophic Lakes in Florida
Where this data comes from
66 measurements from 1 monitoring station, 2023–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples66 samples · 2023–2025
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)